Softbank, Japan achieves 770 Mbps on 3.5 GHz LTE-A trial

Softbank Japan has achieved 770 Mbps on 3.5 GHz LTE-A trial by making use of cutting-edge LTE-A technologies like Carrier Aggregation (CA), Coordinated Multi-Point (CoMP) and Cloud BB (Baseband).

The demonstration was conducted by SoftBank in Tokyo’s densely urban Ginza district. A pre-commercial network-level performance evaluation conducted during the demo determined the network could provide a top user experience in Tokyo’s densely populated Ginza district. It was during this evaluation that advanced LTE-A technologies for the 3.5 GHz band were demonstrated.

The LTE-A technologies demonstration showed Huawei’s equipment can provide a max 770 Mbps download speed and an average 500 Mbps download speed over multiple network sites. Afterwards attendees commented positively on the reliability and stability of LTE TDD technologies on the 3.5 GHz band, and noted their effectiveness for solving weak coverage issues and co-frequency band interference.

SoftBank also demonstrated a “five-carrier CA” technology for LTE TDD on the 3.5 GHz band using a prototype system that can provide a max 1.2 Gbps download speed when run on Huawei’s Ultra-wideband RRU (Remote Radio Unit).

The building of the LTE-A 3.5 GHz trial network and recent successful network demonstration represent milestones in the continuing development and maturation of LTE TDD solutions for the 3.5GHz band.

By 2015 in Japan, further spectrum from 3.4 to 3.6 GHz is expected be allocated for introducing commercial 4G networks. Worldwide, more 3.5 GHz spectrum is expected to be released to promote development of mobile broadband services using high spectrum bands.

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